Refrigeration



Sept. 20, 1932. w.- A. KUENZLI ET AL 1,

REFRIGERATION Filed 0013. 7, 1930 W INVENTORS M fla 4- 4 F\=\ E Z 2 Patented Sept. 20, 1932 UNITED STATES PATENT oFFIcs WALTER A. KUENZLI, F EVANSVILLE, INDIANA, AND ALVIS YATES DOWELL, OI"

HASTINGS-ON-HUDSON, NEW YORK, ASSIGNO BS '10 SERVEL INC 013 NEW YORK,

N. Y., A CORPORATION OF'IDELAWABE REFRIGERATION Application filed October 7, 1930. Serial No. 486,993.

This invention relates to a refrigerating system of the compressor-condenser-evaporator type in which a float valve responsive to the volume of condensed refrigerant from the condenser controls the supply of liquid refriger,ant to an evaporator of the flooded type. A valve of this character is commonly "termed a high side float valve. Occasionally a high side float valve as dew scribed above will stick due to accumulation of foreign matter on the valve seat. Also an accumulation of gas in the float chamber will prevent the proper operation of the valve acting to prevent proper movement 15 of the oat.

This invention contemplates and is dirooted to a means for transmitting mechanical motion through the wall of a vessel and more particularly through the casing of a go float valve, having difierent pressures on oppositesides of said casing or the purpose of unseating the valve or raising the float whereby this act may be accomplished readily and without the necessity 0 providing a as temporary or permanent opening in the casing.

In the drawing- Fig. 1 is a vertical section illustrating one ap lication of the invention; and

ig. 2, a fragmentary similar view'of a modified form.

Referring to Fi 1 of the drawing, a metal casing is provi ed with an inlet conduit 11 and a dischar e conduit 12. The refrigerant is supplied rom a compressor not shown through the conduit 11 into the casing 10 and is discharged from said casing through conduit 12. The upper end of the conduit 12 is provided with a seat 13 for cooperation with a valve member 14 for controlling the discharge through conduit 12.

The valve member 14 is operated by the float 15, the connection between the valve 14 and the float 15 being provided by one arm of a bellcrank 16 which is pivoted at 17a on support 17. The bellcrank 16 has its other arm 18 positioned for engagement by the head 19 of an unseating plunger 20. The plunger 20 extends outwardly throu h the 5 casing 10 and is surrounded by a exible sylphon bellows 21, and an inverted cup 22 forming a protective shell around said bellows and being attached at its closed end to the plunger 20. One end of the sylphon bellows 21 is provided with a collar 23 which is securely attached in any desired manner to make a fluid tight joint with the valve casmg, and, the other end is connected to make a fluid tight joint with the bottom of cap 22. With this arrangement, when it is desired to lift the float and unseat the valve, it is only necessary to push the cap inwardly which moves plunger 20 in the same direction to operate bellcrank 16 to lift the float and unseat the valve. Sylphon bellows 21 seals the opening in casmg 10 through which plunger 20 extends and also tends to return the plunger to its normal inoperative posig12on when pressure is released from the cap The casing 10 is provided with a hollow guide 24 in which is slidable the upper end portion of an upstanding guide rod 25 mounted on the float 15, the guide and guide rod serving to maintain the float in proper centered position in the casing 10.

In Figure 2 a float chamber 26 is provided with a discharge passage 12 in which valve 14 is controlled by float 15, the valve'and float being connected in the same manner as described in connection with Fig. 1. In lieu, however, of the unseating mechanism illustrated in Fig. 1, a modified type of unseating mechanism may beprovided. The casin 26 may be formed with a hollow cylindrical oss 27 threaded on the exterior for the reception of a cap 28. A plunger 29 having a head 30 sim lar to the head 19 of the plun er 20 shown in Fig. 1 is extended through a dlaphragm 31 and secured thereto in a manner to prevent 90 leakage'by some means such as a collar 32 which holds the diaphragm securely against a shoulder on the plunger. The diaphra is secured at its periphery between a-shoul er 33 within the hollow boss 27 and a screw rin 34. The plunger 29 is of suflicient length suc that when the cap 28 is tightened it Wlll move the plunger inwardl flexing the diaphragm 31land operating be lcrank 16 to unseat the va ve.

This mvention is applicable to other designs and t pes of valves than those shown and it will obvious to those skilled in the art that various other changes may be made cap substantially enclosin said diaphragm and operable to move the p unger.

In testimony whereof we aifix our signatures.

in the construction and arran ement without departing from the spirit 0 the invention and, therefore, the invention is not limited to what is shown in the drawing and described in the specification, but only as indi cated in the appended claims.

We claim: 7 i 1. In combination, a casing, a float within said casing, a valve operable by said float, a valve unseating mem er extending throu h said casing, flexible means for sealing t e opening between the casing and the valve unseating member, and a cap operable for moving the valve unseating member and forming a stop for limiting the movement of the valve unseating member. 2. In combination, a casing, a float within valve unseating member extending throu h said casing, flexible means for sealing t e opening between the casing and the valve unseating member, and a cap operable for moving the valve unseating member and forming a stop for limiting the movement of the valve unseating member, said-cap being threadedly connected to said casing.

3. In combination, a casing, a float within said casing, a valve operable by said float, a valve unseating member extending through said casing, flexible means for sealing the opening between the casing and the valve unseating member, and a cap operable for moving the valve unseating member and forming a stop for li mg the movement of the valve unseating member, said, cap being carried by the valve unseating member with the flexible sealing means between the cap and the casing.

4. A device of the character described comprising a casing, inlet and outlet pipes connected to said casing, a valve for controlling the flow through the casing, a float for controlling said valve, a lever pivotally connected to said float and to said valve, a plunger extending through said casing in a manner to engage said lever and unseat the valve, flexible means for sealing the opening between the casing and said plunger, and protective means for said flexible means movable with said plunger. r o

5. A device of the character described comprising a casing, inlet and outlet pipes connected to said casing, a valve for controlling the flow through the casing, a float for controlling said valve, a lever ivotally connected to said float and to sai valve, a plunger extending through said casing in a manner to engage said lever and unseat the valve, and

- flexible means for sealing the opening between the casing and said lunger, said flexible means comprising a 'aphragm, and a said casing, a valve operable by said float, a 

